What EV Charger Do You Need for a 2025 Mercedes-Benz AMG EQS?
Many home chargers can push 48 or 50 amps, but your car caps AC intake at 40 amps. Feeding it a larger supply changes nothing about the charging speed. The onboard inverter takes the 9.6 kW maximum and leaves the rest on the table.
The numbers
| Maximum AC charging rate | 9.6 kW (40 A) |
|---|---|
| Charger size to buy | 40 A |
| Circuit breaker required | 50 A |
| Outlet / connection | NEMA 14-50 outlet |
| Charge port | J1772 |
| Full charge on Level 2 | about 14.1 hours |
| Range added per hour (Level 2) | about 22 miles |
| Full charge on a 120 V outlet | about 94 hours |
| Range added per hour (120 V) | about 3.4 miles |
| EPA rated range | 315 miles |
| Energy for a full charge | about 135.0 kWh at the wall |
Why 40 amps and not more
Pairing this car with a 40 amp Level 2 charger gets you a full battery in 14.1 hours. The EPA test logs a 12.8 hour charge time because laboratory cycles do not always run at the absolute peak rate of the vehicle. Pushing more amperage through a bigger EVSE will not speed this up. The car draws 40 amps and nothing more. Buy hardware matching the onboard limit to avoid paying for overhead you cannot use.
What the install involves
Call a licensed electrician to pull a heavy cable and land it on a 50 amp breaker. The circuit needs a NEMA 14-50 outlet to handle the continuous load safely. Check that your home panel has spare physical slots and enough main service capacity before buying equipment. Hardwiring is also an option if you want to skip the outlet entirely.
Chargers that match this car
Rugged metal enclosure, built for outdoor use.
Portable cordset. Works on 120 V or a 240 V outlet.
Plugs into an existing 14-50 outlet, no hardwiring.
Worth having as well
Common questions
- What connector does this car use?
- It uses a J1772 connector. This model year falls in the industry transition period. Many vehicles ship with a NACS port and include a J1772 adapter, so verify your physical port before ordering.
- Can I use a standard wall outlet?
- Standard 120 volt Level 1 charging delivers 3.4 miles of range per hour. Filling a 135.0 kWh battery from empty this way takes 94 hours. You need a 240 volt Level 2 setup for daily use.
- How much range do I get per hour on Level 2?
- You add 22 miles of range for every hour plugged into a standard Level 2 setup. The EPA rating lists 25 miles per hour due to testing variations.
- What specific chargers fit this car?
- The Grizzl-E Classic 40A, Grizzl-E Mini Portable, and ChargePoint Home Flex NEMA 14-50 all match the 40 amp limit. They plug into the required NEMA 14-50 outlet.
Other vehicles
Charging times derived from EPA data for the 2025 Mercedes-Benz AMG EQS. Electrical requirements follow NEC 625.41, which sizes a circuit at 125% of a continuous load. Always have a licensed electrician verify your panel.